Dental burner



March 20, 1928.

H. J. BoswoRTl-l NER DENTAL BUR Filed Nov.

aan n n a n Patented Mar. Z0, 1928.

HARRY J. BoswORTH, lor, ciiicAediLLinors,

COMPANY, A CORPORATION or'rLLiivOrs.`

riv

AssI'GNOR To HARRY J'. IBOSW'ORTIE( Application led November 28, 1927. SeralrNo. 236,034.

This invention relates to burners, more particularly to dental burners and it may be characterized as an improvement .on the dental burner illustrated and described in United States Letters Patent No. 1,536,079, granted May 5, 1925, to Ernest E.Dal ton.

The burner of the present invention is particularly adapted for removing the wax or other casting and sprue cavity forming material from dental casting cases or in-V vestments and the object of the present invention is the provision of agenerally improved and simplied deviceand more particularly a device having a wider range of heat application and adapted for more uniformly distributing the heat over the height of the casting case or investment., The pres `ent burner is adapted `for morel expeditiously handling investments or castingcases of greater height and is' adapted for burning out the waX or other sprue and casting cavity forming material quickly and, thoroughly.

According to the present invention I provide a pair of burner rings, each having a plurality of inwardly opening' and generally radially directed burner jets or orifices for projecting the iiames radially inwardly substantially the planes of thel ringsrand another object is the provision of an iinproved adjustable supporting arrangement for these burner rings by means of which the relative vertical positions ofthe rings may be convenientlyad-justed. -Y

A further object is thel provision of an improved balanced supporting arrangementv for' the adjustablecasting case or investment supporting means.

The invention is 4illustrated in the accompanying vdrawing in which:

Fig. 1 is a embodying the present Fig. 2 is a vertical line 2`2 of Fig. 1; vand Fig. 3 is a detail horizontal on the line 3-3 of Fig. 2.

Referring to the drawing,

. invention lsection taken the j device shown comprises a base 5, having a pair of.

diametrically opposite hollow upright posts Or standardsl 6 and 7. The upper surface of the base 5 is shown as .raised at 8 and provided with av peripheral'supporting flange 9 and the lower ends of the pOsts'G and 7 are closed and secured upon the topof the base 5 as by means of screws 10. l

Each of the hollow posts 6 and 7 is proplan view of a dental burner section taken on the l0 lfrom these connections into the hollow interiors Ot the posts 6 and 7. Each post 6 and 7 is providedwith a plurality of radially opening air ports 13, opening in around its polygonal sides, as shown in Fig. 3, for admitting air `into the stream of gas flowing' up through the respective burner rings.

The upper burner ring 15 comprises a tube of wrought metal or other suitable inaterialpbent or formed into the horizontal c'i'rcular loop or ring 15. One end of this tube is closed at 16 as by pressing the walls thereof together, or by soldering' or plugging the end of the tube in any suitable or preferred manner. The opposite end of the tube is turned down substantially vertically'at 18 and is telescopieally engaged at its lower end in the upwardly opening internal bore 19 oit the supporting and gas supply post 7. The lower end the upright tube portion 18 has sliding adjustment inV the post 7 to adjust the vertical' position of the burner ring 15 and the lower end of this uprightl tube portion is secured in adjusted position in the post 7 by means of a thumb screw 20. It is to be understood that the sliding it of the tu'be'in'the ypost 7 may,`if desired, be packed `as an additional gas leakage, although we necessary.- It isalso to have not lfound this' be understood that l v post 7, the adjust`` ment which is permitted vis that between the i ports 13 and the thumb screw the tube 15 and 'down at 28 and tele'- its lower end'in the precaution against supporting and'gas supply post 6. The lowy er end of the upright tube portion 28 isvad-v upwardly opening bore3`0` of the post 6 similarly to the adjustment of' the tube18 in the post 7 and the tube 26 is similarly secured A i'nadjusted position as byl means of'a suitable thumb screw 3.2.v The adjustable support for supporting the castingA case, investment or other article to f this manner the casting case,

be heated, comprises a. block slidably mounted on the vertical portion 28 of the burner ring 25 and a rod bent or Jformed intoV a horizontal circular supporting loop or ring 36, with one end turned down at 37 and secured in an opening in the block 35 as by means of a suitable set screw 38. A thumb screw 39 screws throughthe back of the block 35 into engagement with the vertical tube portion 28 and aii'ords a clamping means for, clamping the-block 35 to the tube 28 with the supporting ring 36 at any desired height relative to the burner ring 25.

To provide a balanced and improv-ed suportfor the ring 36 a block 40, similar to the block 35, is slidably mounted on the vertical tube 18 and is similarly clamped to the tube 18 in any i as by means of a thumb screw 42. When the supporting rin 36 is adjusted to its desired vertical position on the tube 28, the block 4() is adapted to be moved up into engagement beneath the ring 36 to support the ring diametrically opposite the block 35. At the Sametime the block 40 is provided with a vertical opening 43 for receiving the down-turned endv 37 of the ring 36 and with suitable set screw means 44, so that the ring.l 36 may be removed :from the block 35V andy secured in the block 40 above the burner ring 25 and below the burner ring 15, should so.V The block 40 is therefore slidable along the post 18 past the burner ring 25 and in investment or other article may be heated from below by the burner ring 25 and around the sides by the burner ring'15.

It is to be understood, of course, ythat kin using the burner,`the castingcase, investment or other article is placed upon a supporting screen 46 which is in turn placed upon and supported by the ring 36. While ascreen is preferable any other suitable supporting sheet orA element mayv of 'course' be employed. They burner rings 15 and 25 are swingable about tne axes of the vertical the burner lring the advantagesv ofthe prior Dalton patentl when the set screw ly to,

tubes 18 and 28 when the thumb screws 20 and 32 are loosened sufficientl to permit the same and when the thum screws 39 and 42 are loosened the blocks 35 and 40 may be swung about the vertical tubes 28 and 18, whereas the supporting ring 36 is swingable about its down-turned end 37 38.is loosened suiiicientpermit.

The burner ring v15 has ak plurality of radial jets or orifices 50v around its inner circumference, which oriiices discharge radially' in the plane of the ring 15 and the lower burner ring 25 has a plurality of similar oriices 52l which are similarly directed radially in the plane of the ring 25. v By and oriice arrangement desired vertical position it be desirable to do are secured and by the disposition of the two rings one above the other a wider range of heat application may be secured and at the same time a uniform application of the heat may be provided overa relatively great height. By adjusting the burner rings 15 or 25 relative to each other the vertical range o1- heat-application may be conveniently adjusted and with the supporting arrangement described the supporting ring 36 may be supported at opposite sides and it may be disposed between the burner rings to provide, or example, a soldering heat application beneath the casting case or investment from the ring 25 and a burning out or wax removing sides of the casting case or investment from the burner ring 15. There are other uses and advantages of the present burner which will be apparent to thoseskilled in the art.

I claim:

1. In a device of the character described, the combination of a plurality of superposed burner rings, yeach of said rings having a plurality of burner jets aroundits in ner circumference, a support for the article to be heated. and means for adjusting said rings relative each other.

2. In a device of the character described, the combination of means Jfor supporting'an article to be heated, a pair of burner rings adapted to surround the article and each provided with a plurality of burner orifices adapted for discharging substantially radially upon the article, said burner rings having relative vertical adjustment and means for securing same in adjusted p0- sition. f 4 i y V3. In a device of the class described, the

Y combination of a pair lof burners, means adjustablyr mounted on one vof said burners and adapted orsupporting an article to be heated adjacent the `burners and means ad- `vjustably mounted on the other burner and adapted to be positioned to support said ar.- ticle supporting means adjacent the other burner.

4.v In a. 4device of the class described, the combination of a. pair' of burners, means adjustably mounted on one of said burners and adapted for supporting an article to be heated adjacent said burner, and means adjustably mounted on the other burner and adapted to be positioned to support said article supporting means `adjacent the other burner, said last means being adjustable past one of the burners and adaptedjfor supporting the article supporting means between the burners.

5. Inv combination, pair of hollow upright gas supply and burner mounting ,posts on said base, a burner ring having a ed in one of said posts, and a second burner ring underlying said first ring and having a a Asupporting base, a

tubular standard mountheat application over the tubular standard mounted in the other post.

6. In combination, a supporting base, a pair of hollow upright gas supply and burner mounting posts on said base, a burner ring having a tubular standard mounted in one of said posts, and a` second burner ring underlying said first ring and having a tubular standard mo-unted in the other post, said tubular st-andards opening into said post-s and said posts having gas supplying connections and air admission ports.

7. In combination, a supporting base, a pair of hollow upright gas supply and burner mounting posts on said base, a burner ring having'a tubular standard mounted in one of said posts, and a second burner ring underlying said iirst ring and having a tubular standard mounted in the other post, a support for an article to be heated, a member adjustable up and down on said last standard for adjustably supporting said article support beneath both said urner rings and a member adjustable up and down on the other standard for supporting the article support adjacent said other standard.

8. In combination, a supporting base, a

.pair of hollow upright gas supply and burner mounting posts on said base, a burner ring having a. tubular' standard mounted in mounting one of said posts, a secondburner rin underlying said first ring and having a tu ular standard mounted in the other post, a support for an article to be heated, a member adjustable up and down on said last standard for adjustably supporting said article support beneath both said burner rings and a member adjustable up and dovvn on .the other standard for supporting the article support beneath both burner rings adjacent the other standard, said last member being adjustable past the lower'burner ring andA adapted for supporting the article support between the burner rings.

9. In combination, a supporting base, a f

hollou7 upright gas supply and burner post on said base, said post having a gas supply connection and air admission means, a burner ring horizontally disposed and having a plurality of burner orifices discharging radially in substantially the plane of the ring, said burner ring having yan upright tubular standard mounted in said post and adjustable above said air admission means and means for securing said standard in adjusted position in said post.

In Witness whereof, I hereunto subscribe my name this 25th day of November, 1927.

HARRY J. BOSVVORTH. 

